Information about the road condition is indispensable to achieve the assistance for safe driving, the optimization of traffic management and the increasing efficiency in road management that are the master plan of ITS. Therefore, an advanced system in corporating a new technique, which can detect the road conditions efficiently, is needed from the viewpoints of both vehicle and road facility system. We proposed elsewhere a new discriminating method of the road condition by means of texture analysis and multivariate discriminant analysis based on image processing as an approach from the viewpoint of the road facility system. However, toward practical use, there remained many problems to be solved to cope with the passing vehicle, passers-by and the weather changes. A technique to reduce these disturbing factors is proposed in this paper. Furthermore, we establish the experimental system and demonstrate the excellent performance of this system by doing inspection about discrimination ability of road condition in the actual outdoors environment.